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244 lines
5.6 KiB
244 lines
5.6 KiB
<template>
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<uv-popup
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ref="popup"
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:overlayOpacity="0.6"
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mode="center"
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bgColor="none"
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:zIndex="1000000"
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@change="onPopupChange"
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>
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<view class="popup__view">
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<view class="canvas" style="width: 566rpx; height: 1060rpx; overflow: hidden;">
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<canvas id="myCanvas" canvas-id="firstCanvas1" type="2d" style="width: 100%; height: 100%;"></canvas>
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</view>
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<button class="btn" @click="saveImg">
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<view class="content">保存到相册</view>
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</button>
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</view>
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</uv-popup>
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</template>
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<script>
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import { mapState } from 'vuex'
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export default {
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data() {
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return {
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path: '',
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wxCodeImage: '',
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baseUrl: 'https://image.hhlm1688.com/',
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canvas: {},
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retry: 10,
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}
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},
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computed: {
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...mapState(['userInfo', 'configList']),
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},
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async onLoad() {
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},
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methods: {
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open(path) {
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this.path = path
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this.retry = 10
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this.$refs.popup.open();
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},
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close() {
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this.$refs.popup.close();
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},
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async fetchQrCode() {
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try {
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this.wxCodeImage = (await this.$fetch('getInviteCode', { path: this.path }))?.url
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} catch (err) {
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}
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},
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drawCoverImg(canvas, ctx, x, y, width, height) {
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return new Promise(resolve => {
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// 海报图片
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const paperImage = canvas.createImage()
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console.log('paperImage', paperImage)
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paperImage.src = this.configList.poster_image
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paperImage.onload = () => {
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console.log('paperImage onload')
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ctx.drawImage(paperImage, x, y, width, height)
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resolve()
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}
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})
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},
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drawQrCodeImg(canvas, ctx, x, y, size) {
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return new Promise(resolve => {
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//二维码图片
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const coderImage = canvas.createImage()
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coderImage.src = this.wxCodeImage
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coderImage.onload = () => {
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console.log('coderImage onload')
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ctx.drawImage(coderImage, x, y, size, size)
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resolve()
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}
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})
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},
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draw() {
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wx.createSelectorQuery().in(this)
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.select('#myCanvas') // 绘制的canvas的id
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.fields({
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node: true,
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size: true
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})
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.exec(async (res) => {
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console.log('res', res)
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if (!res?.[0]?.node) {
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if (!this.retry) {
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console.log('retry fail')
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return
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}
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console.log('retry')
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this.retry -= 1
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setTimeout(() => {
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this.draw()
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}, 200)
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return
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}
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const canvas = res[0].node
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// 渲染上下文
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const ctx = canvas.getContext('2d')
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// Canvas 画布的实际绘制宽高
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const width = res[0].width
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const height = res[0].height
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// 初始化画布大小
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const dpr = wx.getWindowInfo().pixelRatio
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//根据dpr调整
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// dpr 2 4
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// 3 6
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console.log("--dpr", dpr)
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canvas.width = width * dpr
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canvas.height = height * dpr
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let Ratio = canvas.width / 566
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this.canvas = canvas
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ctx.scale(dpr, dpr)
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ctx.clearRect(0, 0, width, height)
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ctx.fillStyle = 'transparent'
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ctx.fillRect(0, 0, canvas.width, canvas.height)
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ctx.save()
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let x = 0
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let y = 0
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let w = 566 * Ratio / dpr
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let h = 1060 * Ratio / dpr
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await this.drawCoverImg(canvas, ctx, x, y, w, h)
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ctx.restore();
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ctx.save()
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x = 316 * Ratio / dpr
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y = 810 * Ratio / dpr
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let size = 210 * Ratio / dpr
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await this.drawQrCodeImg(canvas, ctx, x, y, size)
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uni.hideLoading()
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})
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},
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async init() {
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uni.showLoading({
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title: '加载中...'
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});
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await this.fetchQrCode()
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uni.hideLoading();
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uni.showLoading({
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title: "拼命绘画中..."
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})
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this.draw()
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},
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saveImg() {
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this.$authorize('scope.writePhotosAlbum').then((res) => {
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this.imgApi()
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})
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},
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imgApi() {
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uni.showLoading({
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title: '保存中...'
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});
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wx.canvasToTempFilePath({
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x: 0,
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y: 0,
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width: this.canvas.width,
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height: this.canvas.height,
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canvas: this.canvas,
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success: (res) => {
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let tempFilePath = res.tempFilePath;
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this.saveImgToPhone(tempFilePath)
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},
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fail: (err) => {
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console.log('--canvasToTempFilePath--fail', err)
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uni.hideLoading();
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}
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}, this);
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},
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saveImgToPhone(image) {
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/* 获取图片的信息 */
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uni.getImageInfo({
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src: image,
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success: function(image) {
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/* 保存图片到手机相册 */
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uni.saveImageToPhotosAlbum({
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filePath: image.path,
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success: function() {
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uni.showModal({
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title: '保存成功',
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content: '图片已成功保存到相册',
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showCancel: false
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});
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},
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complete(res) {
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console.log(res);
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uni.hideLoading();
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}
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});
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}
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});
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},
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onPopupChange(e) {
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if (!e.show) {
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return
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}
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this.init()
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},
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},
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}
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</script>
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<style scoped lang="scss">
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.canvas {
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border-radius: 48rpx;
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}
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.btn {
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margin-top: 32rpx;
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width: 100%;
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padding: 22rpx 0;
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box-sizing: border-box;
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font-family: PingFang SC;
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font-weight: 500;
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font-size: 36rpx;
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line-height: 1.4;
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color: #FFFFFF;
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background: linear-gradient(to right, #21FEEC, #019AF9);
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border: 2rpx solid #00A9FF;
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border-radius: 41rpx;
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}
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</style>
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